GNUstep Make not adding -fblocks

[David Chisnall]

I've just noticed this, since I usually add the flag explicitly:

GNUstep make is not adding -fblocks to OBJCFLAGS even when configured with 
clang and libobjc2 , which means that we are getting the ugly 
GCC-compatible-work-around code in NSRegularExpression.m, instead of the simple 
code that uses blocks, and people using blocks in their code are going to get a 
compiler error instead of having it work as they would expect.

David